Disable the touch ack timeout for touch-action:none

content/browser/renderer_host/input/touch_action_filter.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_ACTION_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_ACTION_FILTER_H_
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
 #include "content/common/input/touch_action.h"
@@ skipping 19 matching lines @@
   // Called when a set-touch-action message is received from the renderer
   // for a touch start event that is currently in flight.
   void OnSetTouchAction(content::TouchAction touch_action);
 
   // Must be called at least once between when the last gesture events for the
   // previous touch sequence have passed through the touch action filter and the
   // time the touch start for the next touch sequence has reached the
   // renderer. It may be called multiple times during this interval.
   void ResetTouchAction();
 
+  TouchAction allowed_touch_action() const { return allowed_touch_action_; }
+
   // Return the intersection of two TouchAction values.
   static TouchAction Intersect(TouchAction ta1, TouchAction ta2);
 
 private:
   bool ShouldSuppressScroll(const blink::WebGestureEvent& gesture_event);
   bool FilterScrollEndingGesture();
 
   // Whether GestureScroll events should be discarded due to touch-action.
   bool drop_scroll_gesture_events_;
 
   // Whether GesturePinch events should be discarded due to touch-action.
   bool drop_pinch_gesture_events_;
 
   // Whether a tap ending event in this sequence should be discarded because a
   // previous GestureTapUnconfirmed event was turned into a GestureTap.
   bool drop_current_tap_ending_event_;
 
   // True iff the touch action of the last TapUnconfirmed or Tap event was
   // TOUCH_ACTION_AUTO. The double tap event depends on the touch action of the
   // previous tap or tap unconfirmed. Only valid between a TapUnconfirmed or Tap
   // and the next DoubleTap.
   bool allow_current_double_tap_event_;
 
   // What touch actions are currently permitted.
-  content::TouchAction allowed_touch_action_;
+  TouchAction allowed_touch_action_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchActionFilter);
 };
 
 }
 #endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_TOUCH_ACTION_FILTER_H_